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An integrated current sensing circuit with incorporated comparator function is presented. The current scaling is done in two independent steps, therefore very high current division ratio is obtained, which makes this circuit suitable for converters with large output currents. The additional comparator part eliminates the need for a separate comparator circuit, therefore reduces the design effort and...
The aim of this paper is to draw a state-of-the-art related to the electric motors for grid connected integrated battery chargers in electric vehicle applications. The design process of this type of chargers consists to use the power electronics devices and the electric motor to charge the battery packs when the vehicle is plugged to grid. Actually, any standard has been established. So, this paper...
In distributed fusion architecture, processed information in the form of tracked object data is available instead of raw sensor data. Ignoring the cross-correlation in distributed systems by employing Kalman filter in general leads to inconsistent results. Covariance intersection, on the other hand provide conservative results by overestimating the intersection of individual covariances. In this paper,...
In underwater vehicles controlled by thrusters and fins, effect of the AUV depth control could be seriously affected because of dead zone nonlinearity in steering gear transmission system. This paper takes a certain AUV as an example. In this paper, a nonlinear pid controller is desired in considering of the actuator being saturated; response speed of the actuator is improved through tracking differentiator;...
Path planning is an important part in Mobile robot researches. For the characteristics of mobile environment, it builds two kind of environment models including obstacle environment and barrier free environment. On the basis of the model, TSP model is a traditional template for path planning with kinds of intelligence algorithm. This paper introduces an improved colony algorithm and it performs well...
In order to better study and reveal the discharge mechanism and evolution of the dielectric barrier plasma generator, in this paper, the discharge in atmospheric argon is simulated by 2D numerical method. From the discharge particle chemical reaction of Ar and Ars electronic, it can be obtained that the relationship between the particle concentration change process and the electric field distribution...
Constant physical work is the leading cause of low back pain (LBP) in nurses, which affects their well-being and working efficiency. With this study, we aimed to explore the features of lumbar muscles including multifidi (MF) and musculus transversus abdominis (MTA) of nurses with LBP suffering from lumbar disc herniation (LDH). We estimated the degree of lumbar muscle strain by comparing the lumbar...
Function optimization based on traditional genetic algorithm is easy to fall into local extremum, so that adaptive genetic algorithm is proposed to solve this problem. However, traditional adaptive genetic algorithm has some disadvantages, such as low efficiency and instability. This study presents an improved adaptive genetic algorithm. Specifically, the crossover probability and the mutation probability...
This paper takes the single phase grid-connected inverter as the research object, and designs the double closed-loop control system based on active-disturbance-rejection control (ADRC). It builds the system model, simulates on Matlab/Simulink platform, and compares the simulation results with that of PID control strategy. It also analyzes the influence of disturbances such as harmonic, voltage fluctuation...
High precise reconstruction of hole contour from point cloud is the important step in reverse engineering of sheet metal body parts. High density of point cloud will help improve the accuracy of hole contour reconstruction. But the limits of hardware and data handling capacity prevent the increasing of point cloud density. For the auto-body or large body parts, the point cloud density is limited to...
During the coal cutting process in mines, the drill stem is easy to be deflected in virtue of the complicated geological conditions. The deviation control of drill stems is of great significance for the production efficiency and service life of drill stems. Based on analyzing influence factors of the deflection of drills, this paper builds up a model to describe deflecting forces of the coal seam...
Aimed at the accurate measurement of high-speed motion targets in Active Protection System, a capacitive analytic approach, based on complex variable method, was proposed for the planar capacitive coupling sensor working in quasi-electrostatic field. This approach, applying to analyze symmetry model, needs little calculation and more accurate. It directly reflects the relation between the capacitance...
Research on the method for predicting the fatigue life of the thrust rod based on continuum mechanics theory. In the equivalent stress as damage parameters established rubber fatigue life prediction model. Using finite element simulation and materials testing to obtain the model parameters, and the dangerous parts prone to fatigue cracks. By equivalent stress life model, uniaxial fatigue life of the...
In order to optimize the kinematic and dynamic performance of a 2-DoF planar parallel mechanism used in hybrid machines, a multi-objective optimization method is introduced. Based on the compare of the common kinematic analysis method and dynamic analysis method, the kinematic and dynamic performances evaluation indices which can be used in the performance optimization are introduced. Then a multi...
As the driving task is diversified from singularity, the driver's mental load is increased with the coordinated development between intelligent traffic and information technology. To carry our two different styles for test experiment, different kinds of music test and composite driving test mixed with principal-subordinate driving tasks, three typical tasks have been done in the driver's lab as examples...
The aim of simulation technique for production line is to find out the most feasible scheme which designers made for the project. Simulation technique can verify the actual effect of the project from the schemes. Combined with the actual production mode, the article analyzed the bottleneck of production efficiency under different shifts. It mainly discussed the value of simulation technology for production...
This paper contains the development and analysis of the human motion state and the algorithm of the fall prediction based on the double foot pressure and the micro inertial MEMS sensors. The fall prediction hardware system consists of three parts, the double foot nodes and the waist node and how it was designed, which could measure the foot pressure parameters and the inertial parameters in different...
A common UAV(Unmanned Aerial Vehicle)'s collision avoidance module was introduced in this paper to handle the flight safety of the UAV. Some ultrasonic sensors were used to collect the obstacle's distance and direction information in real time. The fuzzy algorithm was used to plan a new obstacle avoidance path based on the information. By taking over the control right of the flight controller and...
A novel small underwater robot for ocean observation is introduced, especially suitable for fixed point or small range and underwater slit and gully area of ocean observation. The underwater robot adopts the jellyfish shape design, changes its attitude through adjusting underwater robot's center of gravity position, and possesses five degrees of freedom combining the propeller thrust. Four cameras...
According to the principle of electronic compass, we analyze the error of the E-compass and propose a calibration scheme in view of magnetic deviation, which is based on the self-designed tri-axial magnetometer system. The hardware is made by tri-axial magnetometer and tri-axial accelerometer. Considering the magnetic interference of the external environment will affect the magnetic deviation, we...
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